21120410212 has 24 divisors (see below), whose sum is σ = 40364735040. Its totient is φ = 9589721760.

The previous prime is 21120410167. The next prime is 21120410219. The reversal of 21120410212 is 21201402112.

It is not an unprimeable number, because it can be changed into a prime (21120410219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220723 + ... + 301594.

It is an arithmetic number, because the mean of its divisors is an integer number (1681863960).

Almost surely, 2^21120410212 is an apocalyptic number.

21120410212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21120410212 is a deficient number, since it is larger than the sum of its proper divisors (19244324828).

21120410212 is a wasteful number, since it uses less digits than its factorization.

21120410212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523251 (or 523249 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21120410212 its reverse (21201402112), we get a palindrome (42321812324).

The spelling of 21120410212 in words is "twenty-one billion, one hundred twenty million, four hundred ten thousand, two hundred twelve".